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About this blog

I'm a well-known mainframe performance guy, with almost 30 years of experience helping customers manage systems. I also dabble in lots of other technology. I've sought to widen the Performance role, incorporating aspects of infrastructural architecture.
I'm a world-famous podcaster and screencaster (albeit VERY thinly spread). :-)

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I've added the words "on iOS" because this might spread to other platforms. A week ago I posted that I'd pick an app a week and try to get value out of it.
I also said I might blog about what I think. This week's app is Note & Share - an app that runs on both the iPad and the iPhone. (Probably on iPod Touch also but I don't have one of those.) Needless to say this isn't an official IBM view... [More]

Another kernel popped the other day: SMTP / MIME . But what on earth is MiGueL Mainframe troubling himself with SMTP / MIME for?
Let's come at this from a different angle... You probably know by now that when you send me your data it gets put through some batch reporting:
Ultimately I don't create the graphs by hand, but I do do the analysis and put the presentation together myself.
That's the... [More]

You might consider it showing off if I mention I got a Kindle for Xmas. Feel free to. But I'd like to share my experience
with you - as you might find it useful anyway. First, I really like the Kindle as it stands. Mine is a Keyboard 3G one. I felt both the "keyboard" and 3G elements were
important: I surmised (correctly) I'd want to take notes. I surmised (equally correctly) I'd want to be able... [More]